IMPORTANT: This article contains information about modifying the registry.
Before you modify the registry, make sure to back it up and make sure that you
understand how to restore the registry if a problem occurs. For information
about how to back up, restore, and edit the registry, click the following
article number to view the article in the Microsoft Knowledge Base:

WARNING: If you use Registry Editor incorrectly, you may cause serious
problems that may require you to reinstall your operating system. Microsoft
cannot guarantee that you can solve problems that result from using Registry
Editor incorrectly. Use Registry Editor at your own
risk.

To work around this problem, use either of the
following methods to modify the RangeFlags value:

Use the DCHP snap-in:

Start DHCP Manager.

Right-click Scope, and then click Properties.

Click the Advanced tab, and then click to select Both in the Assign IP addresses dynamically to clients
of section.